0469f86182
This patch updates/adds the contributor documentation to follow the guidelines of the Ussuri cycle community goal[1]. [1] https://governance.openstack.org/tc/goals/selected/ussuri/project-ptl-and-contrib-docs.html Story: #2007236 Task: #38554 Change-Id: I11f746df8ddfba5cf0b1e33778c9939a0a5fc760